When the weather is hot, the engine makes noise.

My car is12,2.4. The engine sounds very low when it is cold and louder when it is hot. Do you have the same as me? How to deal with it? My car is12,2.4. The engine sounds very low when it is cold and louder when it is hot. Do you have the same as me? How to deal with it? My car was also produced in 12, and now the sound of the engine is basically the same as when it was new. Personally, the sound of the engine has a great relationship with the oil. What kind of oil do you usually use? When the vehicle is driving, it is sometimes found that the engine is loud, but the reason cannot be found. Now please follow the technician's step-by-step analysis: 1, step on the accelerator, and find that the acceleration is not obvious, the power is insufficient, and the engine has hysterical sound. The most likely time is when the engine is hot, cold or short of oil. The causes of such problems can be divided into air filter, spark plug, ignition wire, fuel, fuel filter, gasifier, oil pump and other problems. Check whether the air filter is dirty, whether the spark plug is old and needs to be replaced, whether the ignition coil is broken, and whether the gasoline is dirty, such as water in the oil circuit. And check the oil pump. 2. When driving, the acceleration is normal, and the ignition may be normal. However, if driving at a constant speed, it is found that the engine speed is too high, but the speed still seems to be unable to be lifted. Try to check the coolant. If the oil pressure is too high or too low, check the oil pressure gauge. It is also possible that there is a problem with the ignition time setting, which will also cause such symptoms. As for the others, it may be an internal problem of the engine, such as EGR valve blockage. The engine hisses, just like steam or air coming out of the engine. Generally, after hearing this sound, the engine will lose power quickly. Possible problem, engine overheating, check the cooling system. The exhaust system is blocked, and the vacuum tube leaks or breaks. 4. The engine will whir when accelerating, or it will appear when decelerating. In short, as the speed (maximum speed) changes, the sound level will also change. Possible cause: the power steering oil is insufficient and filled with oil. The generator bearing may be damaged. When there is a problem with the power steering pump and water pump, it will also produce similar noise. The loud noise from the exhaust pipe is very annoying. Sometimes similar sounds will come from the front section. The main problem is the exhaust system. Check whether the exhaust pipe is broken. 6. When the engine changes speed, it will make a clicking sound, as if something is patting metal. You may not hear it when you speed up, which may be due to the cylinder valve. Adjust the valve to change it. Lack of oil may also cause similar problems, and the oil pressure is relatively low, so it is necessary to check the oil pressure. 7. When you step on the accelerator, you will hear a bang, bang sound coming from the exhaust pipe. The sound may not be very loud, the car will not be abnormal when driving, and the fuel consumption will increase. It is recommended to check whether the muffler and exhaust pipe are damaged. 8, the engine has a kicking sound, like the sound of a pencil knocking on the table, the engine speed increases and the sound increases. Possible cause: There is dust in the engine. It is recommended to change the oil, filter the engine and clean the engine. There may be a valve problem. 9. There may be no problem during driving, and there will be a click when accelerating. It is recommended to check the ignition time setting. The engine may overheat, the engine may have carbon deposit, and the oil is not good. It is necessary to add high-grade oil. 10, sharp noise, similar to squeak. . . . . . . Cheap. . . . . I hate it. I heard it from a distance, especially when the air conditioner is on, and it is more obvious when the weather is cold. Possible reasons: the drive belt slipped and the direction was hit too hard, reaching the limit. The belt is too loose, so tightening it can solve it. 1 1, when driving at a low speed, or when refueling the door, there will be a clank under the engine, especially when the weather is cold. It is recommended to raise the frame and check whether there is an insulation board between the exhaust pipe and the ground. It may be caused by the aging of the insulation board, which can be solved by replacing or removing it. @20 19